I wonder whether there were any such from among the 564 dogs studied. I remember reading somewhere the claim that dogs are likely descended from jackals and coyotes at least as much as from wolves, but the dog people like the wolf idea better.
As for the idea that prehistoric man domesticated wolves, this seems a nasty and unlikely business. More likely, the first dogs were a few extremely rare wild canines who lacked the usual animal fight or flight instinct, and these sought out people when hungary. Increasingly tame dogs would then have evolved, as the friendliest dogs, being best at begging food scraps off of people, survived and prospered. Only when prehistoric human camps already had good safe dogs in tow would humans them had been motivated to select for characteristics of specific breeds. Nobody wants to breed animals which are liable to attack them.